EES3 Hardware Interface Description
5.2 Operating Temperatures
99
EES3_HD_v01.100b
Page 77 of 118
2009-08-12
Confidential / Released
5.2
Operating Temperatures
Note
:
•
See
for further information about the NTCs for on-board and battery temper-
ature measurement, automatic thermal shutdown and alert messages.
•
When data are transmitted over EGPRS or GPRS the EES3 automatically reverts to a lower
Multislot Class if the temperature increases to the limit specified for normal operation and,
vice versa, returns to the higher Multislot Class if the temperature is back to normal. For
details see
.
Table 21:
Board / battery temperature
Parameter
Min
Typ
Max
Unit
Normal operation
-30
+25
+80
°C
Restricted operation
1
1. Restricted operation allows normal mode speech calls or data transmission for limited time until auto-
matic thermal shutdown takes effect. The duration of emergency calls is unlimited because automatic
thermal shutdown is deferred until hang up.
-30 to -40
---
+80 to +90
°C
Automatic shutdown
2
Temperature measured on EES3 board
Temperature measured at battery NTC
2. Due to temperature measurement uncertainty, a tolerance on the stated shutdown thresholds may oc-
cur. The possible deviation is in the range of ±3°C at the overtemperature limit and ±5°C at the under-
temperature limit.
-40
-20
---
---
>+90
+60
°C
Table 22:
Ambient temperature according to IEC 60068-2 (without forced air circulation)
1
1. Temperature values are based on a setup with EES3 mounted onto an adapter without any heat gene-
rating components and connected via flex cable to the Cinterion DSB75 Evaluation Kit.
Parameter
Min
Typ
Max
Unit
Normal operation
-30
+25
+75
°C
Restricted operation
2
2. Restricted operation allows normal mode speech calls or data transmission for limited time until auto-
matic thermal shutdown takes effect. The duration of emergency calls is unlimited because automatic
thermal shutdown is deferred until hang up.
-30 to -40
---
+75 to +85
°C
Table 23:
Charging temperature
Parameter
Min
Typ
Max
Unit
Battery temperature for software controlled fast
charging (measured at battery NTC)
0
---
+45
°C
